Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
A252418
Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
Terms
- a(0) =1099a(1) =1098a(2) =2348a(3) =3796a(4) =11409a(5) =30724a(6) =53782a(7) =173544a(8) =488169a(9) =862550a(10) =2861114a(11) =8190964a(12) =14510150a(13) =48759525a(14) =140792605a(15) =249710691a(16) =844670520a(17) =2449784273a(18) =4347633163a(19) =14756809096a(20) =42898150674a(21) =76155945522a(22) =258954750275
External references
- oeis: A252418